How try and catch Work

Here is how try and catch work:

1. When an Exception is thrown by a statement in the try{} block, the catch{} blocks are examined one-by-one starting starting with the first.
2. The first catch{} block to match the type of the Exception gets control.
   • In the diagram, X, Y, and Z represent different types of exceptions.
   • For example, Y might be IOException.
3. Only one catch{} block gets control.
4. If no catch{} block matches the Exception, none is picked, and execution leaves this method (just as if there were no try{} block.)
5. The most specific Exception types should appear first in the structure, followed by the more general Exception types.
6. The statements in the chosen catch{} block execute sequentially. After the last statement executes, control goes to the first statement that follows the try/catch structure.
7. Control does not return to the try block.